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Kindergarten Math · Chapter 4 · Lesson 1
Taking Away
Some go, some stay.
10 problems · about 9 minutes · K.OA.A.1, K.OA.A.2
What this lesson teaches
The child subtracts within 10 by taking objects away.
- Taking away leaves fewer.
- The − sign means take away.
- Count what is left.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
4 problemsReview — Adding in Any Order: 2 + 6 = ?
Answer 8
Why Eight.
Review — Counting On: 6 + 2 = ?
Answer 8
Why Eight.
Review — Putting Two Groups Together: 3 + 4 = ?
Answer 7
Why Seven.
Review — One More, One Less: One less than 7?
Answer 6
Why Six.
Warm Up
Straightforward practice. Get the method working first.
3 problems8 − 3 = ?
Answer 5
Why Five.
5 − 1 = ?
Answer 4
Why One less than five.
7 − 3 = ?
Answer 4
Why Take three away.
Build It Up
The same ideas with more to keep track of.
2 problems4 − 4 = ?
Answer 0
Why All of them go.
9 − 0 = ?
Answer 9
Why None go away.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
1 problemThe Ducks: Six ducks. Two swim away. How many are left?
Answer 4
Why Four.